How to fill pinholes and bubbles in resin molded slot racing bodies?
Not having them in the first place is the best way … Absent that it kind of depends on where they are and to what extent. If it is a pinhole or void, or very thin area (big bubble that “skinned”) I’ve had good luck filling these in with some modeling putty. If it is a larger area it is good to back the area with some thin styrene sheet superglued into place as a base for the putty. As always with putty–thin coats is good, big lumpy blobs (like I do) are bad. If the “bubbles” are the kinda cottage cheese variety where it looks like an all-over blemish in an area (or the whole part), my best luck has been to lightly sand the area(s) affected and carefully spray on primer to build up a bit then sand back to level. Care must be exercised here to avoid burying detail in primer (see thin coats/thick blobs above, keeping in mind which side of the fence I preach vs which I usually follow).
